Device specific structure

static int gotemp_probe(struct usb_interface *interface,
                        const struct usb_device_id *id)
{
        struct usb_device *udev = interface_to_usbdev(interface);
        struct gotemp *gdev;

        gdev = kmalloc(sizeof(struct gotemp), GFP_KERNEL);
        if (gdev == NULL) {
                dev_err(&interface->dev, "Out of memory\n");
                return -ENOMEM;
        }
        memset(gdev, 0x00, sizeof(*gdev));

        gdev->udev = usb_get_dev(udev);

        usb_set_intfdata(interface, gdev);

        dev_info(&interface->dev, "USB GoTemp device now attached\n");
        return 0;
}